Spring-caster



(No Model.) Y,

, G. H. ROBERTS 8; C. J. STEVENS.

SPRING GASTERL ,299. Patented'July 17, 1883.

:II I

l I Mu VVz'Tness es 694243 6% KW UNITED STATES PATENT OFFICE.

CHARLES H. ROBERTS AND OHANGEY J. STEVENS, -OF 'MONTOUR, IOWA.

SPRING-CASTIER.

SPECIFICATION formingpart of LettersPatent No. 281,299, dated uly 17, 1883.

Application filed January 9, 1883'.

T 0 all whom it may concern.-

Be it known that we, C. H. ROBERTS and O. J. STEVENS, citizens of the United States of America, residing at Montour, in the county -of Tama and State of Iowa, have invented certain new' and useful Improvements in Spring- Gasters, of which the following is a specification, reference being bad therein to the accomconvolution terminates in the vertical wire projection 12, which is threaded, and, being threaded, is screwed into the center of the plate B, the orifice d being threaded for its reception. At the termination of the lower convolution of spiral spring A the wire composing it is bent into a right angle, as shown, in or,- der to-furnish journals for the rollers D, the wire being passed through longitudinal orifices provided in said rollers. The lower convolution terminates in a slight angle just preceding where it is passed through the first roller-orifice, and ashort distance from where the wire in continuation projects from the first roller-orifice it is again bent at right angles, and at a suitable distance from the elbow thus formed it is again thus bent and passedthrough the orifice of the second roller. After the wire is passed through both rollers, the endis bent at right angles, as shown. The metallic plate 13 is fitted to the bottom of the bed-post, and has formed therein screw-orifices 6. (See Fi 5.)

In practice my bed-spring is preferably se- (No model.)

cured to the head-posts of the bedstead, the 5 vertical wire projections I) being inserted in vertical orifices formed in the bottom of the posts; but it. may be employed on all posts with very beneficial results, and it is a very useful auxiliary in producing elasticity where spring-mattressesare employed. employed attached to all the posts of a bedstead, the bed springs and rollers on the headposts may be made larger and stouter than those secured to the foot-posts of the bed. Y

The rollers D are cast hollow, and either of metal or porcelain, and in two longitudinal sections, as shown in Fig. 4, the sections being rigidly, secured together by transverse screws F. The heads of the screws are sunk in suitable sockets or indentations provided on the periphery of the roller, and the screws project transversely on either side of the wire, as shown.

We are aware that spiral springs secured to the legs of chairs :to produce elasticity are shown in the patent of A. M. Blake, of April 28, 1868, No. 77,161; and weare also aware of the spring-caster of Chas. T. Sheen, patented June 29, 1880, No. 229,478, wherein a spiral spring is secured to a single caster, and there When it is fore we do not claim that our invention is broadly new; but

What we claim, and desire to secure by Letters Patent, is

The combination of spring A, having two right-angular wire journals for rollers D, said rollers being composed of sections secured together by countersunk screws, substantially as shown and described.

In testimony whereof we affix our signatures in presence of two witnesses.

Witnesses:

CHARLES A. STEVENS, BUEL W. FELLoWs. 

